MANCHESTER. Literary and Philosophical Society, October 6.—Prof. Osborne Reynolds, F.R.S., Vice-President, in the chair.—Prof. F. E. Weiss communicated a paper on Rachiopteris cylindrica, by the late Mr. Thomas Hick. The name of Rachiopteris was given by Williamson to some plant remains from the Lower Coal Measures of Halifax, which he thought might be true ferns, and described in the Philosophical Transactions, 1878. Mr. Hick describes in detail some further specimens, partly belonging to the Cash Collection at Manchester Museum. In considering the cortical tissues, special reference is made to the presence of small black bodies within the cortical cells, the presence of which is characteristic for Rachiopteris, but the nature of which is still very doubtful.